摘要
目的评价双源CT单能量成像技术在骨折后金属内固定术后的应用价值。方法对48处不同部位骨折内固定术后43例患者采用西门子(Siemens)公司生产的Somatom Definition型双源多层螺旋CT进行双能量扫描,并将扫描所得到的双能量数据调入工作站Dual-Energy软件内,应用Monoenergetic处理。根据软件所提供的光子能量范围,采用不同的光子能量对数据进行处理,将上述数据与用于常规诊断的120 KV融合图像应用相同的多平面重组、容积再现技术进行重组。由两位医生对以上图像的质量进行评价,并进行比较。结果 120 KV时,有45处内固定物有条纹伪影。在80 KeV、120 KeV、160 KeV条件下,图像质量均好于120 KV,其中80 KeV条件下,7处内固定处没有伪影,41处内固定部位仅在金属厚重的部位有少量伪影。结论双源CT的单能量成像技术可以显著提高图像质量,并降低金属内固物产生的伪影。而且80 KeV的光子能量可以提供最佳的图像质量。
Purpose To evaluate the value of dual energy CT techniques with monoenergy after fracture fixation with metal. Materials and Methods 48 different parts of the fracture fixations of 43 patients were included in this study. Dual energy scan was performed at dual energy multislice spiral CT（SomatomDefinition, Siemens）, dual energy date was transferred to the Dual Energy software, Monoenergetic was appled for processing. Different photon energies that according to the photon energy range which the software provided for data processing, the data above and the 120 KV routine diagnostic fusioned imaging were restructure by the same multiplanar reformation（MPR）, volume rendering（VR） technique respectively. Two doctors evaluated and compared the quality of the images. Results 45 fixtures had striped artifacts when 120 KV. In 80 KeV, 120 KeV, 160 KeV conditions, the image quality was better than 120 KV, 7 fixtures artifacts disappeared when under 80 KV, and only at the part of heavy metal had small artifacts in 41 fixtures. Conclusion Dual energy CT techniques with monoenergy can improve image quality significantly, and reduce artifacts produced by metal fasteners. And 80 KeV photon energy can provide the best image quality.
出处
《继续医学教育》
2014年第9期32-34,共3页
Continuing Medical Education
